William K Butler, MD - Medicare Allergy/immunology in Seattle, WA

William K Butler, MD is a medicare enrolled "Allergy & Immunology" physician in Seattle, Washington. He went to Ohio State University College Of Medicine and graduated in 1973 and has 51 years of diverse experience with area of expertise as Allergy/immunology. He is a member of the group practice Kaiser Foundation Health Plan Of Washington and his current practice location is 125 16th Ave E, Seattle, Washington. You can reach out to his office (for appointments etc.) via phone at (206) 326-3000.

William K Butler is licensed to practice in Washington (license number MD00036622) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1588709877.

Contact Information

William K Butler, MD
125 16th Ave E,
Seattle, WA 98112-5211
(206) 326-3000
Not Available

Map and Direction




Physician's Profile

Full NameWilliam K Butler
GenderMale
SpecialityAllergy/immunology
Experience51 Years
Location125 16th Ave E, Seattle, Washington
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • William K Butler attended and graduated from Ohio State University College Of Medicine in 1973
  NPI Data:
  • NPI Number: 1588709877
  • Provider Enumeration Date: 02/21/2007
  • Last Update Date: 05/19/2021
  Medicare PECOS Information:
  • PECOS PAC ID: 0547224461
  • Enrollment ID: I20041118001183

Medical Identifiers

Medical identifiers for William K Butler such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1588709877NPI-NPPES
8243354MedicaidWA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207K00000XAllergy & Immunology MD00036622 (Washington)Primary

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Kaiser Foundation Health Plan Of Washington90320225791480

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. William K Butler allows following entities to bill medicare on his behalf.
Entity NameKaiser Foundation Health Plan Of Washington
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1396810701
PECOS PAC ID: 9032022579
Enrollment ID: O20031112000454

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. William K Butler is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
William K Butler, MD
125 16th Ave E,
Seattle, WA 98112-5211

Ph: (206) 326-3000
William K Butler, MD
125 16th Ave E,
Seattle, WA 98112-5211

Ph: (206) 326-3000

Reviews and Comments


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Frank S Virant, M.D.
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Practice Location: 9725 3rd Ave Ne Ste 500, Seattle, WA 98115
Phone: 206-527-1200    Fax: 206-527-2514

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.